Sectional header for water-tube boilers.



Patented Jan. 27}. I 914,

H. E. BOYRIB. SEGTIONAL HEADER FOR WATER TUBE BOILERS.

APPLICATION FILED APR.12, 1911. 1,085,241.

UNITED sTATEs PATENT OFFICE.

HARRIY EUGENE BOYRIE, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR or ONE'HALF' A TO HAYDEN HOMER TRACY, or BERKELEY, CALIFORNIA.

SECTIONAL HEADER FOR WATER-TUBE BOILERS.

Specification of Letters Patent.

Patented Jan. 27, 1914".

Application filed April 12,1911. Serial No. 620,612.

To all whom it may concern Be it known that I, HARRY EUGENE Bor- RIB, acitizen of the United States, residing at the city of San Francisco, inthe county of San Francisco and State of California, have invented acertain new and useful Improved Sectional Header for Water-Tube Boilers,of which the following is a specification.

This invention relates to sectional headers for steam boilers of thewater-tube class generally, and is more especially adapted forembodiment in the sectional-header types employin sinuous headers andhorizontal steam an water drums disposed above pluralities or banks ofinclined Water tubes, such as are known commercially as Babcock andWilcox boilers; the essential principles of the improvement, however,being also of practical value when employed in relation to otheranalogous constructions.

The main objects of the invention are to obtain the maximum output orextreme capacity from a boiler plant of the type mentioned, bypermitting of forced or extreme firing, and reducing the cost of power;also to obviate the serious objection and fault found to exist atpresent, where, by reason of the slow circulation and discharge from thelowermost banks or rows of water tubes, said tubes become overheatedwith injurious results.

In the construction used at present all of the steam generated in thetubes must pass up through the headers to which they are connected, andthen pass through the single nipple which unites the top end of eachheader-section with the steam and water drum. It follows, therefore,that the steam from the lowermost tubes, (which steam forms the majorpart of the steam from the whole boiler), must pass up through theentire length of the header and nipple. In-

stead, therefore, of these lowermost tubes 5 the banks of tubes inclineupward from having'the easiest point of discharge, they are in realitythe most retarded, due to the water of general circulation in theheader, which offers serious resistance, due to its much greaterdensity, and also due to the fact that the steam has the longest path totravel.

To the useful ends-of obviating all of these objections, and attainingthe beneficial effect above alluded to, my invention consists, brieflyspeaking, but essentially, in dividing each vertical header-sectionhorizontally into two separate chambers, and inserting within its walls,an auxiliary pi e or tube of less sectional area which shal tap thelower chamber only and extend interiorly of the upper chamber to a pointabove the water level in the main steam and water drum of the boiler,passing thereinto through the usual connecting nipple, in such mannerthat the steam and water first and most intensely subjected to the heatof the furnace may be quickly and freely discharged from such minorplurality of the lower ranges of tubes as alone enter the lower chamberof the header, directly into the steam space of the drum above,independently of the general circulation and clear of the steam andheated water passing from the major plurality of tubes enterin the upperchamber of the header-section anc l passing thence through theconnecting nipple into the drum.

I will describe and illustrate my improvement in connection with anordinary Babcock and Wilcox boiler, while dealing with the relief anddischarge of the two lowermost rows of tubes, and employing sinuoussectional headers with the tubes staggered therein, it being understood,however, that I am not limited to the arrangement of the device inconnection with the front headers, or where the tubes incline downwardfrom front to rear of the structure, as the same or an equivalent effectis reached when the attachment is employed in the rear headers of thosetypes of boilerssuch as the marine class-Where front to rear, or areotherwise varied in their general arrangement. J

For more complete comprehension of my is a front sectional elevationshowing one drum and a plurality of sectional headersincluding mydevice. Fig. 3 is an enlarged vertical sectional elevation of sinuousheadersection constructed according to my invention. Fig. 4 is across-section thereof on line 4:, 4.

For clearness, I will first describe the usual parts of a boiler withwhich myinvention is associated.

The numeral 10 indicates the front wall of the boiler setting, 11 one ofthe side walls, 12 the bridge wall, 13 the grate, and 14 the steam andwater drum carried at a high level, all of these features being of thetype,

known commercially as the Babcock and Wilcox boiler.

The water tubes are marked 15 and are disposed in decks, banks or rows,such rows being here staggered vertically and having their ends enteringsinuous multiple headers, such tubes being also inclined downward fromfront to rear, the front headers only being indicated, at 16. Nipples17, connect these headers with cross-boxes 18 and these in turn formopen connection with the drum 14.

My present improved provided with an auxiliary circulating tube 19 ofany suitable material, and preferably constructed in sections 20, 20, asindicated in Fig. 3, for convenience of insertion through the handholes,or otherwise, and of their assemblage within the sinuous-header section.

21 represents a bell or funnel mouth at the lower end of this auxiliarytube 19, and 22 a diaphragm extending entirely across the interior ofthe header 16, to form a lower or auxiliary chamber 23 therein entirelyindependent of the upper portion which forms the main chamber. Theposition of the diaphragm 22 preferably coincides with the bell mouth or0 en lower end of the auxiliary tube; and t 's diaphragm may be cast orwelded in, but it may be made separate and then cemented in, as thisallows one to readily apply my invention to the headers of existingboilers. As illustrated, there is one auxiliary tube 19 for each of theheader-sections of the boiler, located approximately centrally andvertically therein, passing from a point preferably just above theentrance of that row of tubes 15 which is second from the bottom (thediaphragm 22 beheader-section is ing located at or'near that point)upward 66 through the nipple 17 and cross-box 18 into the drum 14,.terminating in the steam space just above the water level.

The purpose and resultant effect of my invention will be apparent fromthe foregoing, inasmuch as a separate upward discharging passage-way orconduit is provided for the steam entering the header from thoselowermost tubes designed to be relieved for the purposes named. Thisseparate auxiliary chamber and conduit will allow a much greater upwardvelocity of a mixturev of steam and heated water from such lowermosttubes, of higher specific gravity than must characterize the mixture inthe compartment in the header above, and consequently insure acorrespondingly greater discharge into the drum than if the whole wereobliged-as at present-to pass upward in one volume (of greater density)through the limited nipples and cross-box to the drum. The retardingeffect on the flow of steam and water from the tubes, and all unduerestriction of the circulation are thus entirely obviated ;and further,from the uninterrupted circulation afforded by'my invention, the steambubbles quickly reach the steam drum, relieving the lower tubes and thuseffectually preventing their softening by the fire and consequentdistortions,while the steam is so quickly chance of injury to. thesetubes is avoided, no matter how hard the boiler may be forced. Thisparticular construction, it is apparent, will insure immunity fromdamage in cases where forced firing is necessary, and also largelyenhance the steam output of boilers of this class, without otheralteration to existing structures.

What I claim and desire to secure by Letters Patent is as follows:

1. In a water tube boiler, the combination with a suitable furnace;a'steam and water drum located at a high levelbetween the front and rearwalls of the setting; a plurality of banks or rows of water tubesinclined downward from front to rear underneath the drum and connectedto their respective headers; a front header composed of inclined orvertically disposed sections at right angles to and receiving theforward ends of the water tubes ;--of a bell mouthed transversediaphragm near the lowermost end of each sectional header therebydividing the header into upper and lower separate chambars; a removablejointed pipe within each header section and extending from the diaphragmto the water level in the drum.

2. In sectional headers for water tube boilers,a header-sectioncomprising a sinuous shell having a plurality of handholes,--

a fixed cross-diaphragm bell-mouthed on its under side and dividing suchheader-section 95 carried off and replaced by water that all 4 pipe ofless sectional area than the shell, in 5 horizontally into upper andlower separate the top of the shell, said pipe being fitted in chambers,the lower chamber receiving ends jointed sections. 1'

of a limited plurality of'the lowermost tubes In testimony whereof, Ihave signed in only of an installation,-and a removable the presence ofthe two subscribing witnesses.

HARRY EUGENE BOYRIE.

communication with said separate lower \Vitnesses:

vlmmber through thediaphragm and passing R0121". A. KELLoNn,

interiorly of the upper chamber out through OLIVER \V. JONES.

